Hi there, my 2 cents would be to look into a large SCT on an alt/az mount. You don't mention a budget, but IMHO the Celestron Evolution 9.25" would be an excellent choice for planetary viewing and imaging (it's what I use for both).
SCTs have the advantage of very long native focal lengths (the C9.25" has a f/l of 2350mm) which is needed for planetary without being too large physically. The alt/az Evolution mount is easy to set up, tracks well, and is quite suited for planetary imaging also. I found it easier to collimate than a Newt.
It is more expensive than the options you were looking at, but there's one for sale on Gumtree right now
Andrew